Horace g



(No Model.)

H. G'. WORTHI NGTON & W. WHEELER.

' EXTENSIBLE BIT STOCK.

NO. 536,116. Patented Mar. 19, 1895.,

,9 W12 WESSZS 1.7V KENT 0726 NITED STATES Erica.

HORACE G. VVORTHINGTON AND WILLIAM WHEELER, OF WVASHINGTON, DIS- TRICTOF COLUMBIA, ASSIGNORS OF ONE-THIRD TO JAMES M. \VHITE, OF

SAME PLACE.

EXTENSIBLE BIT-STOCK.

SPECIFICATION forming part of Letters Patent No. 536,116, dated March19, 1895.

I Application filed November 17, 1894. Serial No. 529,152- (No model.)

.Zo all whom it may concern.-

' Be it known that we, HORACE G. WoErnINe- TON and WILLIAM WHEELER,citizens of the United States, residing at Washington, in the Districtof Columbia, have invented certain new and useful Improvements inExtensible Bit-Stocks; and we do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

Our said invention consists in an improved construction of extensiblebit-stocks for use in boring holes through studding, for running pipesthrough partitions, and all such similar uses where it is inconvenientto get a proper brace against an ordinary bit-stock, as will behereinaftermore fully described and pointed out in the claims.

Referring to the accompanying drawings, which are made a part hereof andon which similar letters of reference indicate similar parts: Figure 1is a side elevation of said bit-- stock with the parts in the positionthey occupy when in use; Fig. 2, a central longitudt nal section throughthe same, and Fig. 3, a detail view of the ratchet.

In said drawings the portions marked A represent the bit-stock, B thebit, and C a ratchet lever for operating the same.

The bit-stock, A, consists of a tubular stand ard mounted on abase-plate having brads, a, on its outer face, said standard beingexteriorly screw threaded. A tubular interiorly screw threaded hand nut,A, is mounted on said standard provided with a loosely fitted cap, a. Anextensible socket, A preferably angular in form, is mounted in saidpart, A, and adapted to slide through a correspondingly formed aperturein said cap, a. A collar, a is mounted on said socket, A and may befixed in any desired position thereon by means of a set-screw. Saidsocket is of the form required to receive the shank of the bit and ofany length, and may be filled to any desired point with packing, a whichmay be of any convenient suitable material, or especially provided forthe purpose. By this means The ratchet lever, O, is in the main of awell known construction. It consists of a hollow lever having a circularratchet, c, journaled in its forward end provided with square notches,and a reversible-pawl, C, mounted in said handle. Said pawl is taperedupon one side and is held forward into engagement with the ratchetbymeans of a spring, 0'. The shank of said pawl extends out through theend of the lever and is provided with a hand piece, 0 by which it may bewithdrawn from engagement with the ratchet and turned over when it isdesired to reverse the operation. The ratchet, c, has a central apertureadapted to fit upon the socket, A

In operation the several parts are assembled as shown in Fig. 1, thelength of the stock being adjusted by means of the collar, a which holdsthe extensible socket, A in the desired adjustment, and the packing insaid socket which supports the bit in the desired extended position. Thehand nut, A, is in its lowest position. The base-plate, A, is thenplaced against the stud or other part opposite the stud or part to bebored and the hand nut then turned to force the bit forward against saidpart. The bit is then turned by means of the ratchet lever operated byone hand and is forced forward by means of the hand nut, A, operated bythe other hand, the brads in the base-plate, A, serving to hold thestock from turning, thus furnishing a secure support. When itis desiredto back out the bit, the pawl, C, is turned and the operation reversed.

Having thus fully described our said invention, what we claim as new,and desire to secure by Letters Patent, is

1. An extensible stock for holding bits, &o.,

consisting of the base, A, the hand nut, A, provided with the cap, ct,the extensible socket, A adjustably supported on said cap,

and a ratchet mounted on said socket for operating same, substantiallyas set forth.

2. An extensible stock for holding bits, (be, consisting of the base, A,the hand nut, A, the cap, a, mounted thereon provided with an aperturefor receiving the extensible socket, A said extensible socket mountedtherein, packing devices in said socket, whereby the bit may beadjusted, said bit mounted therein, and a ratchet operating levermounted on said socket, substantially as set forth.

3. An extensible stock for holding bits, &c., consisting of a tubularstandard mounted upon a suitable base-plate, a tubular hand nut mountedon said standard, a socket ad- In testimony whereof We affix our signa-3o tures in presence of two witnesses.

HORACE G. WORTI-IINGTON. WILLIAM WHEELER. \Vitnesses:

E. W. BRADFORD, NATHAN WEILL.

